Ground
Plane Antenna Calculator
by BucK4ABT
This calculator is designed to
give the vertical length of a quarterwave
ground plane antenna, and the length of each of the four radials for
the selected frequency you have entered. The normal quarter wave ground
plane antenna consists of an insulated vertical radiator and surrounded
by four horizontal radials To find the lengths of the vertical
radiator, and the length of the four horizontal radials, enter the
desired frequency of operation. Click on Calculate and
the lengths will be displayed in meters, feet, and inches.
Once you have finished your groundplane, some pruning of the elements
may be required to finetune the VSWR component This
VSWR optimization will make the antenna perform more efficiently. To
use 1/8 wavelength radials, divide the radial length results by
2. Do not reduce the length of
the vertical radiator. NOTE: Be sure Javascript software is
installed and enabled in your browser.

